docs: def traduction(request, page_id, language_id):
      """Traduction helper."""
      page = Page.objects.get(pk=page_id)
      lang = language_id
      placeholders = get_placeholders(page.get_template())
      language_error = (
          Content.objects.get_content(page, language_id, "title")
          is None
      )
      return render(request, 'pages/traduction_helper.html', {
          'page': page,
          'lang': lang,
          'language_error': language_error,
          'placeholders': placeholders,
      })